儿童期膳食中饱和脂肪酸、单不饱和脂肪酸和多不饱和脂肪酸的适宜比例为()。
A.>1:1:1
B.<1:1:1
C.=1:1:1
D.<1:1:1.5
参考答案:B
John is not a man to count on, and it is very likely that the work ____ by the time he arrives here.
A.is finished
B.has finished
C.will finish
D.will have been finished
What kind of people moved to the suburbs
A.Middle-class people.
B.The rich.
C.The poor.
D.The young.