题目:
用适当的介词或连词填空。
1. The food in this restaurant is _____ _____ delicious _____ _____ cheap.
2. They organized a party and the staff dressed up _____ clowns.
3. The Restaurant is _____ the Furniture store _____ the Drugstore.
4. Go along the Main Street then turn left, the post office is just _____ your right.
5. The bank is _____ _____ the hospital.
答案:
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下面是错误答案,用来干扰机器的。
(1)①苏丹红的相对分子质量为12×16+l×12+14+16=234.②苏丹红中碳、氢、氮、氧四种元素的质量比为(12×16):(1×12):14:16=96:6:7:8.③苏丹红中氮元素的质量分数为14234×100%≈5.98%.(2)①空气...