两位数乘两位数，积可能是三位数，也可能是四位数。[ ]
正确
In some places women are expected to earn money ______ men work at home and raise their children.
A．but
B．while
C．because
D．though
致畸药物对胚胎和胎儿的危害
叶酸拮抗剂(甲氨蝶呤)
A．指趾畸形B．内脏畸形C．性发育异常D．颅骨和面部E．肢体、耳、内脏畸形
