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问题 单项选择题

胃酸的作用( )。

A．乳化脂肪
B．分解脂肪
C．分解蛋白质
D．分解淀粉

答案

参考答案：C

解析： 胃内消化和吸收
胃酸的作用主要是激活胃蛋白酶原，并提供胃蛋白酶发挥作用所需的酸性环境，从而水解蛋白质。

完形填空

Elaine Wu is part of the first generation (代) of Chinese pianists. Born in Shanghai, she began practicing the piano at the    小题1:  of six when she was found to show a strong interest in classical music and the piano. One year later, she w 小题2:  the first prize at a children’s piano competition in Shanghai.

A 小题3:  winning the prize, she went on to study under the    小题4: (著名的) Italian musician and piano educator Maestro Mario Paci. She had put all her energy into her music career in the    小题5: (过去) eighty years.

She put on performances at home a 小题6:  abroad. In 1962, she was regarded    小题7:

the national first-class pianist.

In 1993, Wu was    小题8: (邀请) to teach piano in Singapore. She has been living t 小题9: ever since. In August 2013, her    小题10: (第二) album (专辑), A Generation of Master 2, came out with full support from her fans.
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单项选择题

甲状腺激素的作用是（）

A．麻黄碱 

B．氨茶碱 

C．色甘酸钠 

D．克仑特罗 

E．丙酸倍氯米松
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