单选题
（5.3）A支座的水平方向支座反力FAx =（ ）（2分）
2kN（←）
8kN（←）
0
4kN（→）
单选题
（5.4）A支座的竖直方向支座反力FAy=（ ）（2分）
40kN（↑）
20kN（↑）
5kN （↓）
10kN（↓）
匹配题
I. Vocabulary Skills（2 points）
Sometimes examples can explain the meaning of a word or phrase. For example, sun, rain, and wind are examples of kinds of weather. Look at the columns below. Match each vocabulary word or phrase in the first column with the examples in the second column. (0.4 points each)
kinds of extreme weather
- blizzards, tornadoes, hurricanes, floods, droughts
Earth’s natural materials and gases
- coal, oil, carbon, dioxide, air, water
diseases or health disorders
- stroke, asthma, influenza, pneumonia, headaches
seasons of the year
- winter, spring, summer, fall
natural areas or regions of the earth
- oceans, seas, islands, deserts, forests
单选题
kinds of extreme weather
- blizzards, tornadoes, hurricanes, floods, droughts
单选题
Earth’s natural materials and gases
- coal, oil, carbon, dioxide, air, water
单选题
diseases or health disorders
- stroke, asthma, influenza, pneumonia, headaches
单选题
seasons of the year
- winter, spring, summer, fall
单选题
natural areas or regions of the earth
- oceans, seas, islands, deserts, forests
单选题
Joshua starts feeling depressed and irritable in the winter because .
he gets little work done
he is a graduate student in philosophy
he suffers from Seasonal Affective Disorder
单选题
Seasonal Affective Disorder, or SAD, is a condition that researchers believe affects people during the winter months. Scientists believe it is caused by .
breathing, heartbeat, metabolism, and hormone release
lack of sunlight and a biochemical imbalance in the brain
moodiness, irritability, loss of energy, increased appetite, difficulty concentrating, and sleepiness