植物根的成熟区在大量吸水时,比较下图中①、②、③三个部位的细胞液浓度,正确的是()
A.①>②>③
B.③>②>①
C.①>③>②
D.②>③>①
参考答案:A
Although the price has gone up by 5%, it’s still ________ the limits set by the government.
A.beyond
B.within
C.outside
D.off
建筑结构的荷载中,撞击力属于()荷载。
A.永久
B.可变
C.偶然
D.恒久