煤的哈氏可磨性系数HGI数值越大，该煤就越容易磨。
参考答案：对
A great number of visitors ______attracted to my hometown, and the number of foreigners there_____ quite large.
A．are; are
B．is; are
C．are; is
D．is; is
法洛四联症的表现包括（）
A.出生时即出现发绀
B.蹲踞动作
C.阵发性昏厥
D.容易患肺炎
E.ECG：右心室肥大
