服用短效避孕药发生不规则 * * 出血者应
A．加用止血药
B．立即停药
C．加大药量
D．减少药量
E．加用炔雌醇片
参考答案：E
根据下面对话 中的情景,在空白处填入适当的单词,使对话内容完整.每空一词。
A :Let's play tennis.
B: That 1________interesting. Where is your tennis?
A: It's under the desk. 2______ you have a tennis racket?
B: No,I don't.I have a soccer and a volleyball, but I 3______have a tennis racket.
A: Does your sister 4______ a tennis racket?
B: No, she 5______.She plays baseball.
A: Oh, then let's play baseball. It's fun, too.
形成牙骨质的结构是（）
A.成釉器
B.牙 * *
C.牙囊
D.牙板
E.前庭板
