-What do you think of her spoken English

— How about buying Sam a mobile phone? After all, he isn't a boy any more.

— I think it necessary, for we sometimes want to make sure if he _______ home for dinner. [ ]

A. will come  

B. comes  

C. has come  

D. would come

下图是某同学所绘制的人的口腔上皮细胞结构示意图，据图回答问题．

（1）图中有哪些错误？

（2）请绘出你认为正确的人的口腔上皮细胞图．

此患者还应主要预防

A．产后贫血
B．产褥感染
C．产后尿潴留
D．便秘
E．急性乳腺炎

诺贝尔奖得主朱隶文教授获是个什么学家？

PASSIM卷烟机切割后的双倍长度烟条的分离是在（）上实现的。

A.第一拨烟轮

B.烟支导板

C.喇叭嘴

D.接收鼓