肾炎性肾病的临床表现，下列哪项正确()A．多数患儿血压正常 B．多为选择性蛋白尿 C

已知x＞0，y＞0，且x+2y+xy=30，求xy的最大值．

—I talked with a foreigner for a long time yesterday.

—Great! It’s a good _______ to practice English.

A．habit

B．chance

C．skill

D．Exercise

It’s the same in China --- many people, ________ some are not overweight at all, are always going on diets or taking weight-loss pills, ________ are often dangerous.

A．whose; which

B．of which; who

C．of whom; which

D．who; that

甲状旁腺素分泌不足（）。

A.手足抽搦症

B.黏液性水肿

C.呆小症

D.侏儒症

E.尿崩症

食滞胃痛型胃痛特点是

A．胃痛暴作
B．胃痛，痛连胁肋
C．胃脘灼痛
D．胃痛隐隐
E．胃脘胀满，嗳腐吞食