A boy sits half-way down a grassy slope. The force that keeps him from sliding is
O Weight
O Friction
Gravity
O Momentum

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

airlines i think? or a cruise boat? does this work out for u? ?

want or the answer