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(3分) 蛋白質是由多種氨基酸構成的極為復雜的化合物。丙氨酸是眾多氨基酸中的一種，其化學式為

，丙氨酸的組成元素有_______種，一個丙氨酸分子中共有________個原子。相對分子量

3月29日是校園安全教育日，請你以“創建平安校園”為主題，根據以下三個方面的提示寫一篇英語演講稿。

How to keep safe in school
In P.E. classes	In the dining hall	In the science lab
wear sports shoes do warming up exercises …	don’t run wait in line …	keep your hands away from don’t work alone …

注意：文中不得出現真實的姓名、學校名；80-100詞左右，短文開頭已給出，不計入總詞數。
Hello, everyone! It’s very important for us to keep safe in school.

3月29日是校園安全教育日，請你以“創建平安校園”為主題，根據以下三個方面的提示寫一篇英語演講稿。

How to keep safe in school

In P.E. classes

In the dining hall

In the science lab

wear sports shoes

do warming up exercises

…

don’t run

wait in line

…

keep your hands away from

don’t work alone

…

注意：文中不得出現真實的姓名、學校名；80-100詞左右，短文開頭已給出，不計入總詞數。

Hello, everyone! It’s very important for us to keep safe in school.

3-junior high school life will be over . I will remember those things and teachers _____ are unforgotten .

A．who

B．which

C．that

D．whom

3, He speaks ______English ______French. Instead, he speaks German.

A either;or B not only; but also

C both;and D neither; nor

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