糖的端基碳原子的化学位移一般为A．δppm

When ____ where he was born, Kale said he was a Londoner.

A．asking

B．asked

C．being asked

D．was asked

比x的2倍少2的数是x÷2-2．______．（判断对错）

建设社会主义先进文化，离不开继承、吸收和借鉴历史上的珍贵文化遗产。这主要体现了辩证的否定

A．是事物自身的否定

B．是事物根本性质的变化

C．是联系的环节

D．是发展的环节

小题1:She r          (骑) to school on her bicycle every day.

小题2: My grandma often gets UP e          (早) to do exercise.

小题3:My main t        (任务) was to prepare for the meeting.

小题4: Linda is a s          (聪明) and hard-working student.

小题5: He told me to go out to find some s        (枝条) for a fire.

一般情况下人体触电后可摆脱电源男性为20mA，女性为10mA．