曲轴的轴承间隙是指（）。 ["径向间隙","端隙","背隙","轴向间隙"]
袋装普通干粉砂浆的储存期为3个月。
“三流合一”的B2B电子商务平台是将信息流、支付流和（）结合起来。 ["物流","资金流","业务流","商流"]
It was such a grand view that it（）strong emotion in us sight-seers. ["roused","rose","arose","aroused"]
GPS 3D导航可提供较为准确的定位服务，需要提供这种服务至少需要收到（）颗具有良好几何因子的卫星。 ["3","4","5","6"]
什么是戏曲音乐的“乱弹”？
