更多"Air is the mixture of gases in whic"的相关试题:
[单项选择]Air is the mixture of gases in which ( ) the gas is oxyen.
A. not every of
B. not all
C. none of
D. all of
[单项选择]Air is the mixture of gases in which ______ the gas is oxyen.
A. not every of
B. not all
C. none of
D. all of
[单项选择]What gas does not pollute the air
A. Oxygen.
B. Hydrocarbons.
C. Carbon monoxide.
D. Nitrogen oxides.
[单项选择]
Had I run out of gas, I ought to have called the garage.()
A. had
B. would have
C. would
D. should
[单项选择]Since air is a gas, it has ______.
A. both room and shape
B. shape as well as weight
C. either shape or weight
D. no definite shape
[单项选择]The new type of advertisement which is appearing in newspaper columns______.
A. informs job hunters of the opportunities available
B. promises useful advice to those looking for employment
C. divides available jobs into various types
D. informs employers that people are available for work