汇兑业务具有哪些特点（） ["安全高效","过程简单","方便灵活","通用性强"]
影响凝汽器真空的因素有哪些？
立春这一日，民间的有习俗为“咬春”，此时讲究吃（）。 ["饺子","西瓜","三鲜","萝卜"]
I'm sure Harry will remember, but why not give him a ring（）he forgets? ["in the case","in case of","in case","in the case of"]
台湾海峡的海底就像一条河谷，最深处不过（） ["130米","100米","50米"]
从大豆的根瘤中分离出来的根瘤菌，能侵入哪种根？
