[单选题]柔荑花序的特征之一是花序轴柔软下垂。( )

正确答案 ：B

错误

解析：解析：本句可改为“柔荑花序中，有的花轴柔软下垂，但也有直立的。”

[单选题]该类地貌发于典型的山区

正确答案 ：C

图层较薄，土壤贫瘠

[单选题]B.Below is a housing guide for students going to London.

正确答案 ：R

there are some good bargains.

[单选题]探索遗传物质的过程是漫长的．直到20世纪初期，人们仍普遍认为蛋白质是遗传物质。当时人们作出判断的理由不包括

正确答案 ：C

蛋白质比DNA具有更高的热稳定性，并且能够自我复制

[单选题]---Peter , where did you guys go for the summer vacation?----We________ busy with our work for months, so we went to the beach to relax ourselves.

正确答案 ：C

had been

[单选题]His efforts to raise money for his program were because no one showed any intention to take a cent out of their pockets.

正确答案 ：D

in vain

[单选题]What can we learn from the story?A, Comfort in traveling by t rain.

正确答案 ：C

Smiles brighten people up.

[单选题]What should parents do in raising a teenager according to the text?

正确答案 ：B

Give him advice only when necessary.

[单选题]玉米茎的维管束属于( )。

正确答案 ：C

外韧维管束和有限维管束

[单选题]叫“瓜”而不属于葫芦科。

正确答案 ：B

木瓜

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