在胃酸中稳定且无味的抗生素是
A.红霉素B.琥乙红霉素C.克拉霉素D.阿齐霉素E.罗红霉素
参考答案:B
Everyone can ______ and every dollar counts, please join us and donate some money to help earthquake victims.
A.make a success
B.make a promise
C.make a point
D.make a difference
图为气压带、风带移动规律模式示意图(图中虚线为回归线),读图回答下列小题。
该季节下列各纬度带大陆西岸气流运动状况的叙述,正确的是()
A.0°一10°主要盛行下沉气流
B.10°一20°盛行东南风
C.30°一40°盛行西南风
D.20°一30°盛行上升气流