问题
填空题
设X～N（μ，σ2），当x在（1，3]内取值的概率与在（5，7]内取值的概率相等时，μ=（ ）。
答案
4
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设X～N（μ，σ2），当x在（1，3]内取值的概率与在（5，7]内取值的概率相等时，μ=（ ）。
4
| 阅读理解。 | |||||||||||||||||||||||||
WHERE TO STAY IN BOSWELL YOUR GUIDE TO OUR BEST HOTELS
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| 1. If you want to eat Chinese food, you will go to the restaurant in _______. |
[ ] |
| A. the Fairview Hotel B. the First Hotel C. the Orchard Hotel D. the Osaka Hotel |
| 2. The cheapest price for a single bed is _______ in ______ in Boswell. |
[ ] |
| A. $12, the First Hotel B. $15, the Osaka Hotel C. $12, the Fairview Hotel D. $25, the Orchard Hotel |
| 3. The number of the rooms in the hotel with the best special attractions is ______. |
[ ] |
| A. 120 B. 470 C. 450 D. 180 |
| 4. If a Japanese traveler likes to eat in a French restaurant, is the right place for him to go to. |
[ ] |
| A. 233 Edward Road B. 12364 Venning Road C. 222 Edward Road D. 129 North Road |
| 5. Which hotel faces the Orchard Hotel? |
[ ] |
| A. The First Hotel B. The Osaka Hotel C. The Fairview Hotel D. No Hotel |