问题
多项选择题
快冻法冻融循环试验出现下列哪种情况时（），可停止试验。
A、已达到规定的循环次数
B、抗压强度损失率已达到25%
C、质量损失率已达到5%
D、试件的相对动弹性模量下降到60%
答案
参考答案：A, C, D
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快冻法冻融循环试验出现下列哪种情况时（），可停止试验。
A、已达到规定的循环次数
B、抗压强度损失率已达到25%
C、质量损失率已达到5%
D、试件的相对动弹性模量下降到60%
参考答案：A, C, D
| 根据短文内容，从短文后的五个选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。 | |
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| Eating out is one of the joys in the USA . 1 But the waiters are fine. Choosing a Restaurant 2 Many restaurants call themselves "family restaurants". They serve good food, and they may also serve smaller and cheaper children's meals. When to Eat Many restaurants open at about 11:30 am. It is the time for lunch in the USA. Some keep open until the evening, so it is possible to have a meal in the afternoon. Reserving a Table Eating out is rather popular in the USA. And it is better to reserve a table. Sometimes you will see people waiting for tables at restaurants. Arriving at a Restaurant When you arrive at most restaurants, you should not just go in and sit down before you see the words. Please seat yourself". 3 0ften there will be words "Please wait to be seated". Paying the Bill At many restaurants you can ask the waiter to bring the bill and then pay it on the way out. 4 |