We couldn't see the road clearly               the heavy snow.

A．because

B．because of

C．so

D．though

母婴同室是指：

A．母亲与其婴儿每日至少8小时在一起

B．母亲与其婴儿每日至少12小时在一起

C．母亲与其婴儿每日至少白天在一起

D．母亲与其婴儿每日至少夜间在一起

E．母亲与其婴儿一日24小时在一起