It is _______soluble in ethanol （95) and in acetone, soluble in diethyl ether, and ___

相似题目

• 3:04 is four past three in British English, an in American English it is said as four ________ three

  查看最佳答案

• This entrance is in_______ use :do not block it.

  查看最佳答案

• It is in the library, you _______ talk loudly.

  查看最佳答案

• It is reported that this terrible matter happened in ______.

  查看最佳答案

• In C, it is appropriate to say that a string is a(n) _________.

  查看最佳答案

• In “It is no use persuading him not to smoke.”, the underlined part is __________.

  查看最佳答案

• It is because English is very useful in all the fields________ we are studying it hard.

  查看最佳答案

• In formal occasions, it is indispensable to __________ the etiquette.

  查看最佳答案

• It is common practice__________a battery when it still has some life in it .

  查看最佳答案

• It is indicated in the passage that______.

  A．teachers have not been acting in the same ways as loving parents B．scientific use of control is of no big contradiction to humanistically oriented approaches in children's education C．discipline problems cannot be solved in humanistic ways D．punishment administered by the teacher is indicative of care for the children

  查看最佳答案

• It is implied in the passage that______.

  A．one has no pleasure until he succeeds B．glue can help one focus on one's work C．success has nothing to do with special talent D．success is closely related to patience and steadiness

  查看最佳答案

• It is NOT implied in paragraph 2 that__________ ．

  A.John Kennedy was an excellent serviceman in the army during the World War ll B.Kennedy once took a job of journalist after the World Warll C.Many irregularities arose during Kennedy’S Administration D.Kennedy became a Congressman after he entered politics

  查看最佳答案

• It is mentioned in the passage that ______.

  A．the Bermuda Triangle is not responsible for the missing of so many ships and planes B．no a single ship or plane can easily escape the danger of the Bermuda Triangle C．the loss of ships, boats and planes is chiefly due to human error D．no satisfactory explanations could be given to the mystery of the Bermuda Triangle

  查看最佳答案

• It is obvious that there are at least two vitamins．______ is soluble in fat; _____ is soluble in water．

  A.The one…the other B.One…the other C.One…another D.One…the another

  查看最佳答案

• This is ______ used cr but it’s in ______ very good condition.; × B．the; × C．;This is ______ used cr but it’s in ______ very good condition.; × B．the; × C．; the D．;

  A．a; × B．the; × C．a; the D．a; a

  查看最佳答案

• This is heavy! What's in it？_________

  A．A.I think you don't like it. B．B.My new computer. I just bought it. C．C.I'm glad you're her D．D.Are you really interested in it？

  查看最佳答案

• In winter, there is a lot of ________ and it is _______ every day.

  A．snowy, snow B．snow, snowy C．snow, snow D．snowy, snowy

  查看最佳答案

• It is impossible to predict what type of holidays people will be taking in 100 years’ time. It is possible, __________, that space travel will be a realistic option in the future. _________, it would

  A、for example ... If so B、in fact ... If so C、as a result ... Of course D、for example ... Firstly

  查看最佳答案

• It is suggested in the last paragraph that______in the old world.

  A．children tended to compete for the favor of their parents B．children were determined to throw off their immigrant identities C．children were urged to achieve success in the fluid and classless society D．children worked hard for success along paths chosen by their parents

  查看最佳答案

• It is implied in this passage that______.

  A．mothers have the practice to go to work B．working mothers have no time to stay with their children at home C．young wage-earners are economically independent D．mother's position in a family has been raised

  查看最佳答案

• The bedroom is in a terrible mess; it______cleaned.

  A．can"t have been B．shouldn"t have been C．mustn"t have been D．wouldn"t have been

  查看最佳答案

• "What's in your hand？""It is a ______ bill."

  A．two-thousand dollar B．two thousand dollars C．two-thousand-dollar D．two-thousand-dollars

  查看最佳答案

• It is indicated in Paragraphs 1 and 2 that______.

  A．the way for customers to pay is still limited so far B．several big retailers are planning to incorporate C．the name of the new network may be changed D．compatibility of the payment system is satisfactory

  查看最佳答案

• It is indicated in the text that ________（）

  A．Indonesians are sensitive to password security B．young people tend to have secure passwords C．nag screens help little in password security D．passwords for credit cards are usually safe

  查看最佳答案