Directions: For each of the following sentences, there are four choices. Please choose the best choice according to Text A to complete the sentence.1) When seeing advertisements about learning to speak English in three months or even ten days, the author doesn't know whether to laugh or cry because __________.
A. he is going to lose his job as an English teacher
B. it is so ridiculous to claim that English learning is so easy
C. he finds himself not qualified in English teaching
D. it is impossible for William Shakespeare to encourage a student
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国家标准肉肠的亚硝酸盐含量为≤( )mg/kg。
A. 30
B. 70
C. 10
D. 15
快速检测所用试剂应在( )条件下保存
A. 4~30℃阴凉干燥处
B. 0~14度冷藏
C. -18以下冷冻
D. 20~30阳光照晒
手持ATP适用于( )的检测。
A. 餐用具洁净度
B. 油脂老化程度
C. 微生物菌群
D. 水果蔬菜中的农药残留
下列( )类农药不是农药速测卡的常检农药种类?
A. 有机磷
B. 有机氯
C. 氨基甲酸酯
D. 酶