属灭活疫苗的是
A．脊髓灰质炎疫苗 B．狂犬病疫苗 C．破伤风类毒素 D．卡介苗 E．霍乱菌苗
参考答案：B
浅水花水一般产生在水流不大的卵石滩地，是浅水区的重要标志。
—What do you think of Paul?
—He is friendly to us. He always ______ good solutions to our problems. [ ]
A. ends up
B. stays up
C. makes up
D. comes up with
