_____________ are some desks and chairs in our classroom. [ ]
A. Has
B. There
C. Have
答案:B
全身麻醉时FRC降低()。
A.25%~30%
B.20%~25%
C.15%~20%
D.10%~15%
E.5%~10%
第二种付款方式所付款项的现值为( )元。
A.215605
B.352638
C.163340
D.250000