【单选题】be harmful for与be harmful to的用法区别 Smoking will ( ) others. Smoking will ( ) public civilization.
A.
be harmful to ,be harmful for
B.
be harmful for ,be harmful for
C.
do harmful for ,be harmful for
D.
do harmful for ,do harmful for
【简答题】鞣酸栓剂,每粒含鞣酸 0. 2g ,空白栓重 2g ,已知鞣酸置换价为1. 6 , 则每粒鞣酸栓剂所需可可豆脂理论用量为多少?
【单选题】As you know,reading in the sun _____ your eyes. [ ]
【简答题】Examinations Exert a Harmful Influence on Education
【简答题】If________ ,irrigation can be harmful.
【简答题】立体分为()和()两种,所有表面均为平面的立体称为平面体,包含有曲面的立体称为曲面。
【单选题】A bird that eats harmful insects is called _____ bird.
A.
an insect-eating harmful
B.
a harmful insect-eating
C.
a harmful eating-insect
D.
an eating-insect harmful
【单选题】Are bacteria useful or harmful?
【单选题】立体分为平面立体和曲面立体两种,所有表面均为平面的立体称为( ) 。