小红细胞直径＜
A．7.0μmB．6.0μmC．5.5μmD．5.0μmE．4.5μm
参考答案：B
解析：小红细胞是直径＜6μm的红细胞。
He was very excited and his eyes were ____tears
A．full of
B．filled with
C．full with
D．filled of
通常所说的 * * 衡压力钻井是指压差值在规定范围内的过平衡压力钻井。（）
