【判断题】Westerners prefer concentrated juice.
【单选题】Rather than ____ in the restaurant many westerners prefer to get together with friends for weekends. [ ]
【多选题】下列关于植物组织培养的几种说法中正确的是( )。
【单选题】.-----I heard that many westerners prefer vegetables to meat. -----It is true. Americans eat ___ vegetables each person today as they did 20 years ago.
【单选题】函数y=e 2x (x∈R)的反函数为 [ ]
【多选题】下列行为中,对会计人员处罚为五年内不得从事会计工作的是:
【判断题】曲线y=ax 2 与y=lnx相切,则 .( )
【简答题】联想祖暅原理,计算曲线y=lnx与y=ln(x+1)以及y=±1所围成的封闭区域的面积为______.