题目:The ______ of predator species and prey species is 1:5 in this park, which is an ideal balance in ecological communities.
A、
pace
B、
ratio
C、
speed
D、
rate
喵查答案:B ……继续阅读 »
题目: It’s estimated that 50 percent of people are ______ in vitamin D, which is harmful to their health.
A.defective
B.sufficient
C.deficient
D.efficient
喵查答案:C ……继续阅读 »
题目: Due to the language barrier, he just felt that he didn’t ______ with the local people around him when he was abroad.
A.fitfor
B.fiton
C.fitout
D.fitin
喵查答案:D ……继续阅读 »