單項選擇題It is useful to science()the earth as an object in space.

A.to consider
B.which considers
C.considers
D.the consideration of


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題We must()that the experiment is controlled as rigidly as possible.

A.assure
B.secure
C.ensure
D.issue

2.單項選擇題Be careful,()you'll fall down.

A.on the contrary
B.or rather
C.or else
D.as for