问题 解答题
计算:
①(π-1)0+(-
1
2
-1+|5-
27
|-2
3

2
2
+
3
3
-
6
)+
8
答案

(1)原式=1-2+3

3
-5-2
3
=
3
-6;

(2)原式=

2
+3-3
2
+2
2
=3.

阅读理解

C

Do’s and Don’ts in Whale(鲸) Watching

The Department of Fisheries and Oceans has developed guidelines for whale watching in Johnstone Strait, where killer whales are found on a daily basis each summer. It is strongly recommended that vessel(船只) operators follow these guidelines for all kinds of whales.

· Approach whales from the side, not from the front or the back.

· Approach no closer than 100 metres, then stop the boat but keep the engine on.

· Keep noise levels down — no horns, whistles or racing of engines.

· Start your boat only after the whales are more than 100 metres from your vessel.

· Leave the area slowly, gradually moving faster when you are more than 300 metres from the whales.

· Approach and leave slowly, avoiding sudden changes in speed or direction.

· Avoid disturbing groups of resting whales.

· Keep at low speeds and remain in the same direction if traveling side by side with whales.

· When whales are traveling close to shore, avoid crowding them near the shore or coming between the whales and the shore.

· Limit the time spent with any group of whales to less than 30 minutes at a time when within 100 to 200 metres of whales.

· If there is more than one vessel at the same observation spot, be sure to avoid any boat position that would result in surrounding the whales.

· Work together by communicating with other vessels, and make sure that all operators are aware of the whale watching guidelines.

小题1:64. For whom is this text written?

A.Tour guides.

B.Whale watchers.

C.Vessel operators.

D.Government officials.小题2:65. When leaving the observation areas, the vessel should ______.

A.move close to the beach

B.increase speed gradually

C.keep its engine running slowly

D.remain at the back of the whales小题3:66. When going side by side with whales, the vessel should ______.

A.keep moving in the same direction

B.surround the whales with other boats

C.travel closer and closer to the shore

D.take a good viewing position小题4:67. What is the shortest safe distance from the whales?

A.400 metres.

B.300 metres.

C.200 metres.

D.100 metres.

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