1.When the Greeks had _____ the Persians, a soldier ran from Marathon to Athens.

A. won           B. bitten         C. beaten        D. hit

2.There was a large box behind the door and Peter couldn't _____ falling over it in the darkness.

A. help          B. resist          C. avoid         D. prevent

3.Violent programs on television may have a bad _____ on children.

A. affection       B. pressure       C. influence       D. control

下列有关藻类的描述中，正确的是[ ]

A．藻类有多细胞的，也有单细胞的

B．藻类植物都是没有根、茎、叶分化的多细胞植物

C．海生藻类植物不含有叶绿素

D．藻类植物都生活在海水之中