道路交通事故出现人员受伤时，事故当事人不应当（） A.立即停车 B.抢救伤者 C.移

The pilot, whether ______ or design, made the plane do a sharp turn. [ ]

A. by accident

B. at times

C. suddenly

D. all at once

______ his father and stepfather were Muslim, American newly-elected black president, Barack Obama is Christian.

A．Whether

B．What

C．When

D．While

由两根圆木或钢管做成的扒杆叫（）。

A、人字扒杆

B、摇臂扒杆

C、独脚扒杆

D、双脚扒杆

正常成人的每日需水量是（）

A.1.0～2.01

B.2.0～2.5L

C.2.5～3.01

D.3.0～3.SL

E.2.0～3.01

建立学习型的意义？