孕32~34周血容量增加至() |心脏容量从妊娠早期至妊娠末期约增加至()
A.10%
B.15%
C.20%
D.30%
E.30%~45%
参考答案:E|A
Each of these boys _____ special. [ ]
A. are
B. were
C. be
D. was
企事业单位可以自主选择一家商业银行的营业场所开立()个基本账户。
A.1
B.2
C.3
D.不限制个数