InAugust1977,asatellitetogatherdataaboutthe10millionblackholeswhicharethoughttobeintheMilkyWay.

localpeoplearequestioningthe________(wise)ofspendingsomuchmoneyonthenewroad

1mol单原子分子理想气体的温度从0℃升高到100℃，气体的热力学能增加了______J.(R=8.31J·mol-l·K-1)

Thisadvertisementisa___(type)exampleoftheirmarketingstrategy.

一细长螺线管共有2000匝，其长度为0.6m，真空磁导率μ0=4π×10-7N/A2，若通过的电流为6A，螺线管内的磁感应强度为()