题目

下列仪器不能直接测量力学基本物理量的是（ ）A. B. C. D. 答案：【答案】C【解析】A．刻度尺可以测量长度，故A正确，不符合题意；B．电火花打点计时器可以记录时间，故B正确，不符合题意；C．测力计直接测量力的大小，而力不是力学中基本物理，故C错误，符合题意；D．天平测量物体的质量，故D正确，不符合题意。故选C。Here is how to leave the supermarket with the things you wanted to buy and nothing more.Suggestion 1: Pick up a basket. You’ll head straight for the checkout (收款台) when it starts to get heavy. Don’t use the trolleys (购物车) because they will make you put in extra things.Suggestion 2: Make a list and stick to（坚持） it. Supermarkets usually place things we use every day far away, such as bread and milk. So you have to walk along the aisles (过道) in between, buying things you don’t really need on the way.Suggestion 3: Keep away from BOGOFs (Buy One Get One Free offers). Just how many watermelons can you eat in a week? Fruit and vegetables usually work out cheaper.Suggestion 4: Look up and down. The most expensive things are placed in the middle. For cheaper things, check the higher and the lower places. 【小题1】How many suggestions does the writer give us?A．One.B．Two.C．Three.D．Four.【小题2】To buy things we use every day in the supermarket, we have to ______.A．pick up a basketB．look up and downC．walk along the aislesD．keep away from BOGOFs【小题3】The most expensive things are placed in the ______ places.A．middleB．high C．lowD．near