内蒙古自治区的地貌以()为主。
A.平原
B.山地
C.丘陵
D.高原
参考答案:D
In case you can make a reduction ______ 5% ______ your price, we may strike the deal with you.
A.of, of
B.by, by
C.of, in
D.for , for
通过抑制磷酸二酯酶,升高cAMP水平,加强心肌收缩力的非苷类是
A.地高辛B.洋地黄毒苷C.米力农D.多巴酚丁胺E.毒毛花苷K