下列疾病应做淀粉酶检查的是
A．麻疹B．脊髓灰质炎C．流行性腮腺炎D．流行性脑脊髓膜炎E．猩红热
参考答案：C
John thinks it would be long ________ he is ready for his new job.
A．when
B．after
C．before
D．since
种植规格
