上牙槽后神经阻滞麻醉的重要标志是（） A.上颌结节 B.颧牙槽嵴 C.牙槽孔 D.尖

第一部分

A．愉快

B．有趣

C．痛苦

D．艰苦

She hasn't told me when she ______ her new novel, but she says when she ______ it, I will be the

first reader. [ ]

A. will finish, will finish

B. finishes, finishes

C. will finish, finishes

D. finishes, will finish

If you eat this kind of plant, you ____ very sick. [ ]

A. are

B. were

C. will be

D. have been

重为G的物体在沿斜面向上的拉力作用下，从斜面的底部移到顶部，设斜面长为s，高为h，拉力为F，物体受到的摩擦力为f.。则斜面的机械效率为                      [ ]

A、Gh/Fs        

B、Gh/(F-f)s        

C、Gh/(F+f)s    

D、Gh/ fs

迟发型哮喘反应（LAR）的特点是（）

A.常呈持续性哮喘表现

B.6小时发病

C.肺功能损害严重而持久

D.持续时间长

E.临床症状重