A.blue sleeping polyester bag
B.polyester sleeping blue bag
C.blue polyester sleeping bag
D.sleeping blue polyester bag

A.because
B.because of
C.though
D.in spite of

A.42
B.45
C.36
D.54

A.46 dB.
B.44 dB.
C.54 dB.
D.50 dB.

A.\(\frac{7}{{120}}\,\,A\).
B.\(\frac{{11}}{{120}}\,\,A\).
C.\(\frac{7}{{240}}\,\,A\).
D.\(\frac{{11}}{{240}}\,\,A\).

A.2,5 J.
B.0,05 J.
C.0,5 J.
D.0,25 J.

A.50 cm/s.
B.120 cm/s.
C.130 cm/s.
D.170cm/s.

A.10
B.11
C.8
D.9

A.\({A_1} > 2{A_2}.\)
B.\({A_1} = 2{A_2}.\)
C.\({A_1} < {A_2}.\)
D.\({A_1} = {A_2}.\)

A.580 nm.
B.550 nm
C.600 nm.
D.530 nm.