关于白细胞核象左移，叙述正确的是（） A.杆状核粒细胞以上阶段的细胞增多称核左移 B

已知a+b=3，且a﹣b=﹣1，则a²+b²= _________ ．

Not only _______interested in Beijing Opera but ______beginning to show an interest in it.

A．the father himself is; all his children are

B．the father himself is; are all his children

C．is the father himself; are all his children

D．is the father himself; all his children are

窦神经在减压反射中属于

A．孕激素
B．人绒毛膜促性腺激素
C．雄激素
D．促性腺激素释放激素
E．促卵泡激素释放蛋白

亚慢性毒性试验选用大鼠体重为（）

A.18～24g

B.30～50g

C.50～70g

D.80～100g

E.180～240g

If the cause of severe list or trim is off-center ballast，counterflooding into empty tanks will（）.

A.increase the righting moment

B.increase the righting arm

C.increase list or trim

D.decrease list or trim