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When Adam got up on October 3, he began his day without his morning coffee. By 11:00 a.m., Adam was in a terrible mood. He was tired and had a headache. At 11:30, he had a meeting with his student advisor. In the meeting, he found it almost impossible to continue. What was going on?
Caffeine, a chemical found in coffee, was most likely the reason for how Adam felt. Caffeine is a stimulant that boosts(增加) energy levels and improves concentration- but only for a short time. Lowering caffeine consumption(减少摄取咖啡因) often makes a drop in blood pressure and the result is a “coffee headache”. People who stop drinking coffee often say they feel tired and moody, and find it hard to focus.
The good news is that these feeling usually pass after four and five days. During this time, doctors suggested taking some aspirin for the headache. So, if Adam can wait, in less than a week, he may be feeling much better.
1．We learn from the reading Adam ▲ .
| A．does researches on caffeine |
| B．can never be feeling better |
| C．still drinks 5 to 6 cups of coffee a day |
| D．had some problems because of coffee |
| A．healthier | B．uneasy | C．energetic | D．awaken |
| A．coffee can never cause headaches |
| B．aspirin can stop us thinking coffee |
| C．more and more people will give up coffee |
| D．Adam will be better if he stops drinking coffee |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
