正确答案: B

激素在人体内含量较低，但有高效的生物催化作用

题目：关于人体激素的叙述，错误的是

解析：

激素在人体内起调节作用，有高效催化作用的是酶。

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举一反三的答案和解析：

[单选题]成膜体在细胞板的形成过程中起着重要的作用。( )

正确

[单选题]

needn’t

[单选题]Michael’s new house is like a huge palace, with his old one.

compared

[单选题]有无乳汁是判断是否为桑科植物的一个关键性特征。( )

错误

解析：解析：“一个关键性特征”应改为“识别特征之一”，因为并非所有桑科植物均有乳汁，而有乳汁的植物可见于其他许多科。

[单选题]When are the visitors expected to ask questions ?

During the lunch hour

[单选题]46______

shortly

[单选题]BHaving a husband means an extra seven hours of housework each week for women, according to a new study. For men, getting married saves an hour of housework a week. “It’s a well-known pattern,” said lead researcher Frank Stafford at University of Michigan’s Institute for Social Research. “Men usually work more outside the home, while women take on more of the housework.”

is the main breadwinner D． is the master of the house

[单选题]在海岛开发的过程中，该岛

需要防范强风、暴雨、风暴潮等自然灾害