Some students can do very well in English exams, but can understand what a native speaker says.
A:exactly
B:always
C:easily
D:hardly
当电路中的保险丝被烧断时,你应采取的措施是 ( )
水的比热容为4.2×103J/(kg•℃),将4kg的水倒掉一半,剩下水的比热容是____J/(kg•℃);初温为30℃、质量为2kg的水吸收2.1×105J的热量后温度将升高到____℃