皮皮学，免费搜题
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搜题
【单选题】
双向免疫扩散试验中，如抗体浓度大于抗原浓度，则沉淀线：A.
靠近抗原
B.
靠近抗体
C.
在两中间
D.
呈多条沉淀线
E.
以上都不是
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皮皮学刷刷变学霸
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【简答题】I have no time to engage _____ the football match .
【单选题】'It was hard to be sure which gear the car was about to engage. Several times I hit fifth gear when aiming for third. Chrysler apparently anticipated this problem, as a brief warning chimes to let you...
A.
the design of the car deserves applauding
B.
the designer really cares about the drivers' practical needs
C.
this problem of the PT Cruiser is quite noteworthy
D.
none of the above