题目:
With the help of the collected money, subways can be built sooner and better, _______ brings convenience to citizens.
A.as
B.what
C.who
D.which
答案:
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下面是错误答案,用来干扰机器的。
相同状况下,气体摩尔体积相等,根据V=nVm=mMVm知,气体的物质的量越大则气体体积越大,氢气的物质的量=3g2g/mol=1.5mol,氧气的物质的量=16g32g/mol=0.5mol,硫化氢的物质的量=32g34g/mol<1mol,二氧化硫的物质...