破碎各部机器既能（）启动，也可以（）启动。
参考答案：单独、成组
______improve his oral English, he took part in the summer course
A．So as to
B．In order to
C．So that
D．In order that
设i=10%，则现在的1000万元等于5年后的（）万元。
A．1510.5
B．1510.06
C．1610.5
D．1610.6
