孕妇血容量增加达高峰的时间是()。
A.孕12~19周
B.孕20~28周
C.孕28~30周
D.孕32~34周
E.孕36~38周
参考答案:D
在行驶中,驾驶人在注意与前车保持安全距离的同时,也要谨慎制动,防止被后车追尾。
-- Can you lend me the book Twilight by Stephenie Meyer?
-- Sorry. I returned it to the library just now. Maybe it is still _____.
A.available
B.affordable
C.acceptable
D.valuable