血细胞中，数量最多的是_________，有明显细胞核的是_________，体积最小的是________。
红细胞 白细胞 血小板
-I called you this morning, but nobody answered.
-I _______ the flowers in my garden at that time.[ ]
A.watered
B.was watering
C.water
D.am watering
A number of endangered animals are nowadays.
A．dying away
B．dying out
C．dying off
D．dying from
