预制桩的接桩工艺包括()。
A.硫磺胶泥浆锚法接桩
B.挤压法接桩
C.焊接法接桩
D.法兰螺栓接桩法
E.直螺纹接桩法
参考答案:A, C, D
Mike ______ his computer and checked his e-mail. [ ]
A. turned on
B. turned off
C. turned up
D. turned down
党的基本路线的核心内容是 ( )
A.“一个中心,两个基本点”
B.坚持四项基本原则
C.坚持改革开放
D.艰苦奋斗