【名词&注释】
含沙量(sediment concentration)、细胞膜(membrane)、植物种子(plant seed)、大孢子叶(megasporophyll)、酶系统(enzyme system)、红豆杉纲(taxopsida)
[单选题]内力作用主要影响河流的
A. 流向
含沙量
汛期
流量
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举一反三：
[单选题]叶柄翅大，果直径大于10 cm。
A. 柚
B. 酸橙
C. 柠檬
D. 金橘
[单选题]红豆杉纲(taxopsida)和买麻藤纲植物种子具假种皮。假种皮来源于( )。
A. 大孢子叶
B. 套被
C. 珠托
D. 盖被
[单选题]
B． counted
C． organized
D． enjoyed
A. permittedB． counted
B. organized
C. enjoyed
[单选题]南瓜和葡萄的卷须都是茎卷须。( )
A. 正确
B. 错误
[单选题]______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.
A. Although
B. As long as
C. If only
D. As soon as
[单选题]According to Paragraph 2, why may a person suddenly forget who has called?
A. He may leave his prefrontal cortex temporarily damaged.
B. He is probably interrupted by another task.
C. He is probably not very familiar with the person he has called.
D. He may need a rest between dialing and speaking.
[单选题]— It’s the office! So you ( ) know eating is not allowed here. — Oh, sorry.
A. must
B. will
C. may
D. need
[单选题]药物排泄过程是指（ ）。
A. 是指药物在体内经肾代谢的过程
B. 是指药物以原型或代谢产物的形式排出体外的过程
C. 药物在体内受酶系统(enzyme system)的作用而发生结构改变的过程
D. 药物向其他组织的转运过程
E. 药物透过细胞膜进入体内的过程
[单选题]导管分子的端壁形成( )。
A. 气孔
B. 穿孔
C. 纹孔
D. 水孔
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