胃酸生理作用的错误叙述是A．激活胃蛋白酶原 B．有助于小肠对铁

搜题请搜索小程序“爱下问搜题”

问题单项选择题

胃酸生理作用的错误叙述是

A．激活胃蛋白酶原

B．有助于小肠对铁和钙的吸收

C．杀死胃内细菌

D．促进小肠维生素B。的吸收

E．排入十二指肠促进促胰液素的分泌

答案

参考答案：D

填空题

根据句意，用括号中所给词的正确形式填空，每空填一词。

1. Blue is a calm and ________ (peace) colour. It can make you feel relaxed.

2. Most of the teachers in primary schools are ________ (woman) , as well as in some middle schools.

3. Jim was good at ________ (draw) pictures when he was a little child.

4. The programme started with a ________ (discuss) about the problem.

5. The audience ________ (clap) and screamed with joy after the last performance ended.

单项选择题

搭设木脚手架1000平方米，单排架高10米，杉杆长6米，约用拉杆（）根。

A、300

B、320

C、330

D、340