下列选项中，不属于局部麻醉的是
A．表面麻醉B．局部浸润麻醉C．区域阻滞D．骶管阻滞
参考答案：D
葡萄胎在清宫术后血β-HCG通常降至正常水平的时间是（）
A.2周
B.4周
C.8周
D.12周
E.14周
--- ____________ he is, ____________ mistakes he will make.
--- That’s true. That’s why he got a low mark again.
A．The more careful, the less
B．The more careless, the more
C．The more careful, the more
D．The more careless, the fewer
