经产妇，末次月经不详，超声测量胎囊最大直径是1cm，计算孕龄是（）
A.4～5周
B.8周
C.10周
D.10～12周
E.9周
参考答案：A
根据图画内容完成句子。
1. Li Lei often does his homework ______ in the evening.
2. Mr. Wang usually goes to work ______.
3. Li Tao's father is a ______.
4. The boys are ______ now.
5. ______ a car in the tree.
实质性要求和条件是指招标文件中关于（ ）的主要条款。
A．安全、环保及文明施工
B．工期、安全和合同
C．工期、质量及合同
D．质量、安全及环保
