Let Ω be a sample space. Letbe an event. The complement of E is denoted by and it can be defined as follows:().

A.let alone

B.let out

C.let down

D.let go

A.let alone

B.let by

C.let down

D.let in

A.Let’s me

B.Let’s us

C.Let’s to

D.Let’s

--We need some toothpaste.

--

A. Let’s go to the bookstore.

B. Let’s get some.

C. Let’s buy them.

D. Let’s go.

You‘ll be there tomorrow——you won’t ________ me ________， will you？

A. let……， of

B. let……， out

C. let……， down

D. let……， off

Let. Then.

A.let loose

B.let go

C.let alone

D.let out

A.单纯线性关系

B.当LET＜10kev＞

C.当LET＞10keV/μm时，RBE随LET增大迅速上升

D.当LET＞100keV/μm时,BET随LET增大而增大

Let. Then.

You' d better () the car because you are drunk.

A. let me drive

B. let me to drive to

C. let me drive

A.Let’s

B.Let me

C.Shall we

D.Let we