This is Miss Zhang. She _________ our new teacher.[ ]
A. is
B. am
C. are
D. were
答案:A
一些2分与5分的硬币共299分,其中2分的个数是5分个数的4倍,5分的有( )个。
“树怕伤皮”是因为树皮被破坏后,筛管被破坏,不能向下运输有机物。[ ]